Strap for Manufacture Heart Beat

The Frederique Constant Manufacture FC-945MC4H9 requires watch straps with a lug width of 20 millimetres. This dimension is the proportionate standard for the 42mm case and ensures correct attachment and wear without play. To verify, measure the distance between the inner shoulders of both spring bars: it must be exactly 20mm.

For a rose gold timepiece, we recommend alligator in dark brown or shell cordovan in burgundy: both dialogue naturally with the warmth of rose gold without competing visually. Vegetable-tanned calf leather is ideal for those seeking lightness and a patina that evolves over time. For informal use, waxed rubber in black offers practicality and elegant contrast.

Remove the strap using a spring bar tool to compress the internal springs of the attachments. Position yourself under natural light, press the tool button to compress the spring of one spring bar, withdraw the old strap, insert the new one and release the spring until it clicks shut. Repeat on the other side. Avoid forcing during the operation.

Yes, any strap with a 20mm lug width is compatible with your Frederique Constant. On milanostraps.it you will find a selection of artisan straps in this width, customisable for size, initials and thread colour. The Casati Milano atelier also offers bespoke solutions with direct consultation.

A high-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) worn daily has an average lifespan of 3-5 years. Longevity depends on sun exposure, humidity, frequency of wear and maintenance. Well-cared-for leather with annual conditioning significantly improves durability. Casati Milano straps include an 18-month warranty and professional maintenance.